Before leaving the PSP scene, Prometheus developer Liquidzigong left everyone a parting gift in the form of the Prometheus-4 module which will allow you to play games that require 6.20 OFW and above and

For those looking to play the latest PSP games that require 6.31 OFW on your favorite custom firmware but can’t due to the new firmware requirement, Chinese hacker liquidzigong has updated his Prometheus module